package Day8;

import java.util.Scanner;
// 1:无需package
// 2: 类名必须Main, 不可修改
/**
 * 2021Java真题:求余
 * https://www.lanqiao.cn/problems/2365/learning/
 */
public class Main3 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        //在此输入您的代码...
        System.out.println(2021 % 20);
        scan.close();
    }
}